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  • noise from battery

    Hi - I'm using a 12volt 4.5 amp hr. lead acid battery for my setup. I've discharged it completely before a few times, but now that I've done it it's making a funny "squeaking noise," and I can hear bubbling inside. I'm writing to make sure that this is normal.
    Thanks.

  • #2
    What are you charging it with, and have you checked the water level in it.
    MSEE, PE

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    • #3
      Hi Sunking - I haven't checked the water in it - it's a pretty tightly sealed unit. It's stopped bubbling now, so I'm thinking it's OK. The squeaking is what threw me off.

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      • #4
        I charge it with a 30 watt PV panel

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        • #5
          Originally posted by tubu View Post
          I charge it with a 30 watt PV panel
          Do you have the panel connected directly to your battery?

          Dennis

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          • #6
            Originally posted by tubu View Post
            Hi - I'm using a 12volt 4.5 amp hr. lead acid battery for my setup. I've discharged it completely before a few times, but now that I've done it it's making a funny "squeaking noise," and I can hear bubbling inside. I'm writing to make sure that this is normal.
            Thanks.
            If the battery has a "screw off cap" you are OK, and just need to be sure to add distilled water.

            If the battery appears pretty well sealed, and says AGM or GEL on it, you have been boiling it, and the squeak is gas (used to be water that's been electrolyzed into H & O2) leaving via the relief valve. That's BAD when it happens. Generally, you begin to loose capacity, as electrolyte is boiled away.
            Powerfab top of pole PV mount (2) | Listeroid 6/1 w/st5 gen head | XW6048 inverter/chgr | Iota 48V/15A charger | Morningstar 60A MPPT | 48V, 800A NiFe Battery (in series)| 15, Evergreen 205w "12V" PV array on pole | Midnight ePanel | Grundfos 10 SO5-9 with 3 wire Franklin Electric motor (1/2hp 240V 1ph ) on a timer for 3 hr noontime run - Runs off PV ||
            || Midnight Classic 200 | 10, Evergreen 200w in a 160VOC array ||
            || VEC1093 12V Charger | Maha C401 aa/aaa Charger | SureSine | Sunsaver MPPT 15A

            solar: http://tinyurl.com/LMR-Solar
            gen: http://tinyurl.com/LMR-Lister

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            • #7
              Thanks for your comments - I'm connect my battery to my panel via a low-budget charge controller. The battery itself is pretty well sealed. Mike - besides losing capacity, do you think there are any health or safety risks associated with this leak?

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              • #8
                Originally posted by tubu View Post
                ....besides losing capacity, do you think there are any health or safety risks associated with this leak?
                With just a single battery, I doubt you could generate enough hydrogen to cause an explosive hazard. Sealed batteries are either gel or agm, and they don't "spill" acid if broken open. Just don't eat the goo inside!
                Powerfab top of pole PV mount (2) | Listeroid 6/1 w/st5 gen head | XW6048 inverter/chgr | Iota 48V/15A charger | Morningstar 60A MPPT | 48V, 800A NiFe Battery (in series)| 15, Evergreen 205w "12V" PV array on pole | Midnight ePanel | Grundfos 10 SO5-9 with 3 wire Franklin Electric motor (1/2hp 240V 1ph ) on a timer for 3 hr noontime run - Runs off PV ||
                || Midnight Classic 200 | 10, Evergreen 200w in a 160VOC array ||
                || VEC1093 12V Charger | Maha C401 aa/aaa Charger | SureSine | Sunsaver MPPT 15A

                solar: http://tinyurl.com/LMR-Solar
                gen: http://tinyurl.com/LMR-Lister

                Comment

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